An interesting possibility - that taking supplements of a type of vitamin E known as gamma tocopherol may reduce the inflammation of the airways common in asthma patients – eosinophilic inflammation.
Note that these findings were from a preliminary study of 15 people with mild asthma, done by researchers at the Univ. of North Carolina. Now larger and longer studies need to be done, especially to make sure that side-effects and an increased risk for hemorrhagic stroke won't occur with gamma tocopherol, as it does for the other form of vitamin E (alpha tocopherol) commonly found in supplements. From Medical Xpress:
The shortness of breath experienced by the nearly 26 million Americans who suffer from asthma is usually the result of inflammation of the airways. People with asthma typically use albuterol for acute attacks and inhaled steroids to limit chronic inflammation. Both medications come with side effects. But what if it was possible to keep asthma under control by changing one's diet or taking a vitamin supplement? It may happen sooner than you think.
Preliminary research results from the UNC School of Medicine indicate that a type of vitamin E known as gamma tocopherol may reduce eosinophilic inflammation – a kind of airway inflammation common in asthma patients. The results were published in the Journal of Allergy & Clinical Immunology.
"We started looking into vitamin E because epidemiologic data suggested that people with high amounts of vitamin E in their diet were less prone to asthma and allergic disease," said Michelle Hernandez, MD, professor of pediatrics and senior author of the study. There are several different isoforms of vitamin E. The type commonly found in vitamin supplements – alpha tocopherol – has been studied previously, but the results suggested that alpha tocopherol was not particularly effective. Even worse, the alpha isoform seemed to be associated with an increased risk for hemorrhagic stroke.
So UNC researchers took a different tack and asked whether the kind of vitamin E being used might have an effect on the outcome. They began looking more closely at gamma tocopherol, the type of vitamin E commonly found in a diet rich in nuts and nut oil. .... "While the alpha isoform does have antioxidant activities, gamma tocopherol has both an antioxidant and a very unique anti-inflammatory action as well," she said "That anti-inflammatory effect is what we think made the difference in this study."
Participants in the study were randomized into two groups that received either gamma tocopherol supplement or a placebo for two weeks. At the end of that period, they were asked to cough up sputum..... After a three week "washout period" where they took nothing, subjects were placed in the other group: if they took the supplement for the first two weeks, they took a placebo for the second period.
"The advantage of a cross-over design like this is that we are able to compare the subjects to themselves," said Burbank. "And what we found is that when people were taking the vitamin E supplement, they had less eosinophilic inflammation." In addition to decreased inflammation, those who were taking vitamin E were also found to have lower levels of proteins called mucins, which affect the stickiness of mucus. Mucins are often elevated in asthmatics.